Orbit Fit and Astrometric record for 19TL8

The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.

# Object: 19TL8     
# Created Sat Dec  4 02:14:05 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     39 observations of     39
# Arc:   3.26y
# First observation: 2016/08/07
#  Last observation: 2019/11/09
# Chi-squared of fit:    35.21 DOF:     72 RMS:  0.17
# Min/Max residuals:    -0.48    0.42
# Exact a, adot, b, bdot, g, gdot:
  4.280669E-05  4.872176E-01  1.446889E-05  1.840623E-01  1.846504E-01 -1.549696E-01
# Covariance matrix:
  1.9870E-12 -4.2118E-07  8.8993E-13 -1.8862E-07 -1.4746E-15  2.7195E-07
 -4.2118E-07  1.3185E-01 -1.9501E-07  5.9221E-02  4.8457E-10 -8.5399E-02
  8.8993E-13 -1.9501E-07  4.5774E-13 -8.8982E-08 -6.8614E-16  1.2633E-07
 -1.8862E-07  5.9221E-02 -8.8982E-08  2.6650E-02  2.1772E-10 -3.8370E-02
 -1.4746E-15  4.8457E-10 -6.8614E-16  2.1772E-10  1.7893E-18 -3.1396E-10
  2.7195E-07 -8.5399E-02  1.2633E-07 -3.8370E-02 -3.1396E-10  5.5330E-02
#      lat0       lon0       xBary       yBary       zBary        JD0
  -14.904301  -44.153553    0.008187   -0.260857   -0.980524  2457607.939099
# Heliocentric elements and errors
Epoch:              2457608.5000  =  2016/08/08
Mean Anomaly:          342.52656 +/-     0.000
Argument of Peri:       19.42048 +/-     0.000
Long of Asc Node:      344.85489 +/-     0.000
Inclination:            24.61047 +/-     0.000
Eccentricity:         0.47348190 +/-    0.0039
Semi-Major Axis:     10.71312707 +/-    0.0000
Time of Perihelion: 2458230.1539 +/-       0.0
Perihelion:           5.64065532 +/-    0.0415
Aphelion:            15.78559881 +/-    0.0415
Period (y)               35.0657 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            4.47362947 +/-    0.0000
Ecliptic Y           -4.36095994 +/-    0.0000
Ecliptic Z           -1.39280915 +/-    0.0000
Ecliptic XDOT         0.00394402 +/-    0.0000
Ecliptic YDOT         0.00623388 +/-    0.0000
Ecliptic ZDOT         0.00322829 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO    6.40094568 +/-    0.0000
Geocenter to KBO      5.41573558 +/-    0.0000
# Hcoef: 13.67

The following table shows the complete astrometric record for 19TL8. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (19TL8) followed by the observatory code and reference code for the source of the astrometry.

2016 08  07.43831  21 33 31.228  -30 14 52.92  21.9w 19TL8     F51  C~59vD      
2016 08  07.45022  21 33 30.867  -30 14 53.03  21.9w 19TL8     F51  C~59vD      
2016 08  07.46219  21 33 30.519  -30 14 53.74  21.5w 19TL8     F51  C~59vD      
2016 08  07.47410  21 33 30.173  -30 14 53.86  21.7w 19TL8     F51  C~59vD      
2017 07  30.48976  23 18 28.924  -06 29 16.51  21.3w 19TL8     F51  C~3Qz8      
2017 07  30.50177  23 18 28.722  -06 29 15.99  21.6w 19TL8     F51  C~3Qz8      
2017 07  30.51377  23 18 28.529  -06 29 15.42  21.5w 19TL8     F51  C~3Qz8      
2017 07  30.52569  23 18 28.299  -06 29 14.95  21.3w 19TL8     F51  C~3Qz8      
2017 08  03.54041  23 17 17.629  -06 26 51.88  21.2w 19TL8     F51  C~3Qz8      
2017 08  03.55120  23 17 17.424  -06 26 51.68  21.4w 19TL8     F51  C~3Qz8      
2017 08  03.56195  23 17 17.214  -06 26 51.45  21.4w 19TL8     F51  C~3Qz8      
2017 09  12.31893  23 00 14.218  -06 26 04.35  20.9w 19TL8     F51  C~59vD      
2017 09  12.33056  23 00 13.876  -06 26 04.35  21.0w 19TL8     F51  C~59vD      
2017 09  12.34217  23 00 13.543  -06 26 04.48  21.0w 19TL8     F51  C~59vD      
2017 09  12.35382  23 00 13.212  -06 26 04.67  21.1w 19TL8     F51  C~59vD      
2017 09  14.40666  22 59 14.527  -06 26 20.85  21.1w 19TL8     F51  C~3Qz8      
2017 09  14.41865  22 59 14.177  -06 26 20.90  21.1w 19TL8     F51  C~3Qz8      
2017 09  14.43058  22 59 13.835  -06 26 21.01  21.1w 19TL8     F51  C~3Qz9      
2017 09  14.44251  22 59 13.485  -06 26 21.03  21.0w 19TL8     F51  C~3Qz9      
2018 11  09.37907  00 23 19.190  +21 13 21.13  21.1w 19TL8     F52  C~3Qz9      
2018 11  09.39265  00 23 18.934  +21 13 19.83  21.3w 19TL8     F52  C~3Qz9      
2018 11  09.40630  00 23 18.676  +21 13 18.55  21.3w 19TL8     F52  C~3Qz9      
2018 11  09.41990  00 23 18.423  +21 13 17.02  21.2w 19TL8     F52  C~3Qz9      
2019 10  14.490262 02 45 31.697  +42 49 44.21  22.2G 19TL8     F52  C~3Qz9      
2019 10  14.497446 02 45 31.487  +42 49 45.06  21.6G 19TL8     F52  C~3Qz9      
2019 10  14.504542 02 45 31.282  +42 49 45.57  21.9G 19TL8     F52  C~3Qz9      
2019 10  14.511683 02 45 31.091  +42 49 45.80  21.6G 19TL8     F52  C~3Qz9      
2019 10  26.526799 02 39 17.137  +42 59 38.92  22.2G 19TL8     F51  C~3Qz9      
2019 10  26.538364 02 39 16.736  +42 59 38.82  21.6G 19TL8     F51  C~3Qz9      
2019 10  26.549923 02 39 16.350  +42 59 39.14  21.8G 19TL8     F51  C~3Qz9      
2019 11  01.457502 02 35 59.427  +42 58 56.33  22.2w 19TL8     F51  C~3Qz9      
2019 11  01.469503 02 35 59.014  +42 58 56.01  22.0w 19TL8     F51  C~3Qz9      
2019 11  01.481521 02 35 58.602  +42 58 55.71  22.0w 19TL8     F51  C~3Qz9      
2019 11  04.31721  02 34 23.15   +42 57 18.5   21.3R 19TL8     695  C~3Qz9      
2019 11  04.32452  02 34 22.89   +42 57 18.2   21.5R 19TL8     695  C~3Qz9      
2019 11  04.33183  02 34 22.64   +42 57 17.7   21.1R 19TL8     695  C~3Qz9      
2019 11  09.425415 02 31 32.072  +42 52 23.55  21.4G 19TL8     F52  C~3Qz9      
2019 11  09.426078 02 31 32.034  +42 52 23.21  21.6G 19TL8     F52  C~3Qz9      
2019 11  09.437140 02 31 31.622  +42 52 22.97  21.4G 19TL8     F52  C~3Qz9      

The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.

     1   0.0000      0.00    -0.35       0.00     0.18
     2   0.0000      0.00    -0.33       0.00     0.37
     3   0.0001      0.00    -0.09       0.00    -0.04
     4   0.0001      0.00     0.16       0.00     0.13
     5   0.9776      0.00     0.02       0.00    -0.14
     6   0.9776      0.00     0.08       0.00    -0.11
     7   0.9776      0.00     0.28       0.00    -0.02
     8   0.9777      0.00    -0.10       0.00    -0.03
     9   0.9886      0.00     0.06       0.00     0.05
    10   0.9887      0.00     0.12       0.00    -0.08
    11   0.9887      0.00     0.09       0.00    -0.18
    12   1.0976      0.00    -0.03       0.00     0.00
    13   1.0976      0.00    -0.05       0.00     0.11
    14   1.0976      0.00     0.06       0.00     0.08
    15   1.0976      0.00     0.21       0.00    -0.00
    16   1.1033      0.00    -0.07       0.00    -0.07
    17   1.1033      0.00    -0.07       0.00    -0.03
    18   1.1033      0.00     0.02       0.00    -0.06
    19   1.1034      0.00    -0.01       0.00     0.00
    20   2.2558      0.00     0.15       0.00    -0.09
    21   2.2559      0.00     0.10       0.00    -0.03
    22   2.2559      0.00     0.03       0.00     0.06
    23   2.2559      0.00     0.00       0.00    -0.10
    24   3.1843      0.00    -0.21       0.00    -0.02
    25   3.1843      0.00    -0.16       0.00     0.21
    26   3.1843      0.00    -0.08       0.00     0.11
    27   3.1843      0.00     0.24       0.00    -0.27
    28   3.2172      0.00     0.20       0.00     0.09
    29   3.2172      0.00     0.02       0.00    -0.10
    30   3.2173      0.00     0.06       0.00     0.13
    31   3.2335      0.00     0.00       0.00    -0.02
    32   3.2335      0.00     0.02       0.00    -0.01
    33   3.2335      0.00     0.05       0.00     0.02
    34   3.2413      0.00    -0.08       0.00     0.40
    35   3.2413      0.00    -0.20       0.00     0.42
    36   3.2413      0.00    -0.17       0.00     0.24
    37   3.2553      0.00     0.31       0.00    -0.19
    38   3.2553      0.00     0.08       0.00    -0.48
    39   3.2553      0.00    -0.45       0.00     0.09

The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.

19TL8    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        10.707    10.707    10.707
ecceobj         0.475     0.475     0.475
incobj         24.646    24.646    24.646
qmin            5.308     5.405     5.616
qmax           21.155    16.050    16.051
amean          11.263    10.704    10.551
amin            9.222     9.321     9.001
amax           13.457    11.001    11.098
emean           0.470     0.441     0.412
emin            0.405     0.404     0.317
emax            0.575     0.492     0.475
imean          24.274    25.089    24.577
imin           20.978    22.085    21.957
imax           26.078    26.075    26.080
excite_mean     0.626     0.612     0.586
fracstop        0.003     0.002     0.003
cjmean          3.672     3.784     3.843

libcent 0      -180.0    -180.0    -180.0
libamp  0      -180.0    -180.0    -180.0
libcent 1      -180.0    -180.0    -180.0
libamp  1      -180.0    -180.0    -180.0
libcent 2      -180.0    -180.0    -180.0
libamp  2      -180.0    -180.0    -180.0
libcent 3      -180.0    -180.0    -180.0
libamp  3      -180.0    -180.0    -180.0
libcent 4      -180.0    -180.0    -180.0
libamp  4      -180.0    -180.0    -180.0

kozaimean       199.4     191.6     186.7
kozaiamp        177.2     176.9     177.6